Device for removing wax from artificial-denture casts



WW suma B. WATSON DEVICE FOR REMOVING WAX FROM ARTIFICIAL DENTURE CASTSFiled Aug. 4 1923 h I I I w mm A Immemm"; BE T/3 Wfi TJOA/ Patented New.25,

BERTE WATSON, OF 3031 ELIZABETH, SOUTH AFRICA.

DEVICE FOR REMOVING VIAX FROM ARTIFICIAL-DENTURE CASTS.

Application filed August 4, 1923.

To aZZ to 7mm 2'2, may concern Be it known that I, Bnn'rn WATSON, asubject of the King of Great Britain, re siding at Port Elizabeth, inthe Union of South Africa, have invented certain new and usefullmprovements'in Devices for Removing Fax from Artificial-Denture Casts,of which the following is a specification.

The principal object of this invention is to provide a new and improvedportable device by means of which a fine jet of steam 'or superheatedwater may be utilized for scalding, melting, cleaning and removing waxor the like from casts such as are commonly used by dentists in themanufacture of artificial dentures and while the device as constructedis particularly devised for use by the dental profession, it mayobviously be used for similar purposes in other arts.

A further object is to provide a convenient arrangement of a valveactuating handle and carrying handle by means of which the operator mayoperate with the fingers or thumb of the hand by which the device is,carried, a valve for permitting the escape of steam from the device.

Another object is to provide means for holding the steam escape valve ina normally closed position.

For the accomplishment of these and such further objects as willhereinafter be apparent to those skilled in the art to which thisappertains, the invention consists in the construction, combination andarrangement of parts herein specifically described and illustrated inthe accompanying drawings, wherein is shown a preferred embodiment ofthe invention, but it is to be understood that changes, variations andmodifications may be resorted to which fall within the scope of theclaims hereunto appended.

In the drawings forming a portion of this specification Fig. 1 is a sideelevation of a device constructed in accordance with my invention, and

Fig. 2 is a plan view of the device shown in Fig. 1..

As shown in the drawings, the device comprises a hermetically sealedkettle A, preferably constructed of sheet metal and sub stantiallyelliptical horizontal cross'see= tion, its top and bpttom being slightlybulged as illustrated, Y

Serial No. 655,789.

A filling plug B is provided in the top adjacent one of the side edgesand an an tomatic safety or escape valve is also attached to the top atany convenient point. A handle I) of any suitable heat insulatingmaterial is secured to the top by means of the metal clips E and a jetnozzle F is sccured to one of the end walls. The nozzle F is providedwith the valve plug G re tained in place by the provision of the usualspring washer and cotter pin. One end of the plug G has secured theretoone end of an operating link 5/ to the other end of which is pivoted aconnecting link 7L also pivoted to an actuating lever H. The actuatinglever H is pivotally mounted on a fulcrum pin K supported in a bracketL, which is preferably secured to the top of the kettle by means of thesecuring means for the adjacent clip E. l'he upper end of the lever H asclearly shown in the drawing extends to one side of and adjacent thehandle D, and is curved into a hooked shape, its outer end beingprovided with a thumb piece J so that the lever and valve G may beconveniently actuated by the thumb or a finger of the hand which graspsthe handle D. A torsional spring M is coiled about the pin K and acts tonormally hold the lever H in elevated position with the valve Gr closed.

The operation and use of the device is as follows, the kettle beingpartially filled with water is set to boil by placing it upon anysuitable stove or if desired an electrical heating unit may beincorporated in the structure for this purpose. When the pres sure ofthe steam generated by heating the water is suiiicient to actuate thesafety valve 0, the device is ready for use and the operator holding thedevice by means of the handle D may manipulate the device so as todirect the nozzle towards the work which is to be cleaned, the operatorby then press ing the thumb piece J causes the lever H and connectinglinkage to open valve G and permit the escape of a fine jet of steamunder pressure against the work, thereby scalding, cleaning, melting andremoving the wax or the like. When the operator releases the pressureupon the thumb piece, the spring M will return the lever H to its normalupper position and thereby close the valve G. It will thus be seen thatbecause of the ease with which the device may be manipulated that thesteam jet may be directed againstt-he Workwhen and Where it is desiredentirely by the hand which holds the device, thus leaving the other handtree for the use of such other instruments as maybe desired.

Having thus described my invention, What I claim astnew and desire tosecure by Letters Patent, is

1. A device for removing wax from artificial denture casts comprising aherme cally sealed kettle, said kettle provided with a filling plug anda safety valve, a jet nozzle secured to the end Wall of said kettle, andmeans to control the escape oi steam from said nozzle.

2. A ,deviceforremoving war from artificial denture casts comprising ahermetr cally sealed kettle, a heat insulating handle rigidly secured tothe upper surface of said kettle, a jet'nozzle secured to the ,end xvallof said kettle, a rotatable valve in said nozzle, a lever pivotallymounted .on said kettle provided Wlt-ll a thumb' piece adjacent saidhandle to permit actuation ct said thumb piece by the lingers or thumbof the hand of the operator which engages said handle and meansconnecting said lever and valve.

3. A device for removing war from artiticial denture casts comprising ahermetically sealed kettle, a heat insulating handle rigidly secured tothe upper surface of said kettle, a jet nozzle secured to the end wallof said kettle, a rotatable valve in said nozzle, a lever pivotallymounted on said kettle provided with a thumb piece adjacent said handleto permit actuation ot said thumb piece by the fingers or thumb of thehand. 0'? the operator which engages said handle and means connectingsaid lever and valve, and means to normally hold said lever in anelevated position corresponding to a closed position or said valve. 7

In testimony whereof I have alliued ]ll signature.

Y T? all,

